122 lines
3.4 KiB
Java
122 lines
3.4 KiB
Java
/*
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* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jfr.internal.tool;
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import java.io.PrintWriter;
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abstract class StructuredWriter {
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private final static String LINE_SEPARATOR = String.format("%n");
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private final PrintWriter out;
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private final StringBuilder builder = new StringBuilder(4000);
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private char[] indentionArray = new char[0];
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private int indent = 0;
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private int column;
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// print first event immediately so tool feels responsive
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private boolean first = true;
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StructuredWriter(PrintWriter p) {
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out = p;
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}
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final protected int getColumn() {
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return column;
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}
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// Flush to print writer
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public final void flush(boolean hard) {
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if (hard) {
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out.print(builder.toString());
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builder.setLength(0);
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return;
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}
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if (first || builder.length() > 100_000) {
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out.print(builder.toString());
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builder.setLength(0);
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first = false;
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}
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}
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final public void printIndent() {
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builder.append(indentionArray, 0, indent);
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column += indent;
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}
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final public void println() {
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builder.append(LINE_SEPARATOR);
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column = 0;
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}
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final public void print(String... texts) {
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for (String text : texts) {
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print(text);
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}
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}
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final public void printAsString(Object o) {
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print(String.valueOf(o));
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}
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final public void print(String text) {
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builder.append(text);
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column += text.length();
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}
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final public void print(char c) {
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builder.append(c);
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column++;
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}
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final public void print(int value) {
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print(String.valueOf(value));
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}
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final public void indent() {
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indent += 2;
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updateIndent();
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}
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final public void retract() {
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indent -= 2;
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updateIndent();
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}
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final public void println(String text) {
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print(text);
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println();
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}
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private void updateIndent() {
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if (indent > indentionArray.length) {
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indentionArray = new char[indent];
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for (int i = 0; i < indentionArray.length; i++) {
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indentionArray[i] = ' ';
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}
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}
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}
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}
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